import { asyncRouterMap, constantRouterMap } from 'src/router'

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
    if (route.meta && route.meta.role) {
        return roles.some(role => route.meta.role.indexOf(role) >= 0)
    } else {
        return true
    }
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, roles) {
    const accessedRouters = asyncRouterMap.filter(route => {
        if (hasPermission(roles, route)) {
            if (route.children && route.children.length) {
                route.children = filterAsyncRouter(route.children, roles)
            }
            return true
        }
        return false
    })
    return accessedRouters
}

const permission = {
    state: {
        routers: constantRouterMap,
        addRouters: []
    },
    mutations: {
        SET_ROUTERS: (state, routers) => {
            state.addRouters = routers
                //常量路由表合并 授权路由表
            state.routers = constantRouterMap.concat(routers)
        }
    },
    actions: {
        GenerateRoutes({ commit }, roles) { //解构  commit
            return new Promise(resolve => {
                //解构 data={roles}的形式直接取出来roles
                // const  roles  = data
                console.log(roles)
                let accessedRouters
                    // if (roles.indexOf('admin') >= 0) {
                    //     //管理员全部权限
                    //     accessedRouters = asyncRouterMap
                    // } else {
                    //     //非管理员获取相关的权限
                    //     accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
                    // }
                    //所有人的权限都要获取
                accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
                commit('SET_ROUTERS', accessedRouters);
                resolve();
            })
        }
    }
};

export default permission;